51340779 has 36 divisors (see below), whose sum is σ = 88137504. Its totient is φ = 28701792.

The previous prime is 51340777. The next prime is 51340787. The reversal of 51340779 is 97704315.

It is a happy number.

It is not a de Polignac number, because 51340779 - 2¹ = 51340777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51340771) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19489 + ... + 21965.

It is an arithmetic number, because the mean of its divisors is an integer number (2448264).

Almost surely, 2^51340779 is an apocalyptic number.

51340779 is a deficient number, since it is larger than the sum of its proper divisors (36796725).

51340779 is a wasteful number, since it uses less digits than its factorization.

51340779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544 (or 2534 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 51340779 is about 7165.2480068732. The cubic root of 51340779 is about 371.6671276535.

The spelling of 51340779 in words is "fifty-one million, three hundred forty thousand, seven hundred seventy-nine".